Sleep & Consciousness Flashcards
consciousness
awareness of self and surroundings
states of consciousness range from
alertness to sleep
alertness
being awake, aware of who you are, environment focused, engaging and coding info into memory
day-dreaming
more relaxed, not as focused as in alertness. Could be self-induced (meditation)
drowsiness
just before falling asleep/after just waking up
sleep
not aware of self or world around you
electroencephalograms (EEGs)
measures brain waves;
alpha
beta
delta
theta
beta
12-30 hz. Alertness/awake
alpha
8-13 hz. day-dreaming
theta
4-7 hz. drowsiness
delta
0.5-3 hz. deep sleep or coma
first 3 states of sleep are categorized in
non-rapid eye movement
N1
theta waves
hypnagogic hallucinations
tetris effect
hyping jerks
N2
deeper than n1
theta waves
sleep spindles
k-complexes
sleep spindles
burst of rapid brain activity
k-complexes
suppress cortical arousal and keep you alseep
N3
delta waves
very difficult to awaken
where sleep walking/talking happens
when should you wake up to remember your dream?
during REM (paradoxical sleep)
sleep cycle`
N1 - N2 - N3 - N2 - REM - N1
why do we get sleepy in the afternoon?
circadian rhythms controlled by melatonin
melatonin is produced in
pineal gland
sigmund freud theory
dreams are unconscious thoughts and desires that need to be interpreted
evolutionary biology theory
threat simulation to prepare for real world
insomnia
persistent trouble falling asleep or staying asleep
